Walter opavsky



Feb. 3, 1931. w. OPAVSKY 1,791,033

APPARATUS FOR DRYING GOODS 01- ANY CHARACTER I Filed larch 21 1928 UNITED STATES RA E N T 'dmc" 'wurna oravsxr, or smear, ommm mmrus non ravine 609208 or m moans application fled larch 21, 1928, Serial No. 288,570, and in Germany September 21, 1.927.

consists of a case adapted to receive the arti-' cles to be dried,a fan or blowe'r connected at its suction and ressure sides with the said case and adapte to circulate a current of air through the said case, and means for heating the said current of air. In the practical operation the efiiciency of the apparatus has.

been found to be unsatisfactory for the reason that the current of air is more-and more saturated with moisture so that vaporization is gradually reduced. Further, the drying of articles having a coating of lacquer is unsatisfactory, because the said coating of lacquer is not suficiently exposed to the action of oxygen. i

The object of the im rovements in this case is toprovide a metho of and an apparatus for" drying articles of the character referred to, which method is more satisfactory operation. More particularly my improved method is adapted for dryingobjects having a coating of lacquer, and I have found. that by my improved method the time required for drying the coating of lacqueris reduced, and the result obtained is improt ed in so far as a better and more elastic coating of lacquer is obtained. With these objects 1n view my invention consists in continuously removing a part of the air or gas circulated through the case, and more particularly a part of the said air or gas which is particularly loaded with T vaporized moisture, vapor or the like, the' said portion of the air being replaced by sh air or gas supplied to the current of air i of anapparatus for separatingapart of the moisture or vapor from the current of air the said moistfire or vapor being separated by,centrifugal action, so that a comparatively high percentage of the moisture or solvent s removed with the aim, For taking fresh 5.;-

flowing into the case. Thus the current of air I air or fresh gas into thedcirc'ulating current an injector or ejector may be provided, or the I said air or gas is forced into the case or into the conduit connecting the same with the fan or blower by means or a pump. to

In a modification ofthe method I supply ozoniferous air to the current of air-for removing the bad-odour of the vapor escaping from the case. orvthrough the doors thereof,- which va ors are obnoxious to the attendants. Further, y the said ozoniferous air the dry ing operation is improved. Preferably means are provided for continuously generating ozone in the supply of fresh air used for replacing the mixtureof air and vapor re- Q moved from the circuit. Any lmovvn or preferred apparatus for e'n'erating ozone may be provided, for exampie I make use ofan apparatus operated ,by electric energy of high voltage. q

For the purpose of explaining the invention two examples embodying the same have been shown in the accompanying drawing, in which I V Fig. 1, is an elevation partly in section showlng the apparatus, and i t Fig. 2, is an elevation showing a modifica- In the example shown in Fig. 1 the drying system comprises a case a provided 'internah, ly with shelves adapted to have the articles to be dried placed thereon, a fan 0- having its suction pipeconnected with the case, a separating receptacle d. connected with the fan 0 by a pipe 6 and communicating with the bottom part of the case a through a pipe b and heating means"; disposed in the bottom part c of the case a, the said heating means being for exam le in the form of an electrically heated coil. .Thebottom part 6 is connected with a supply 9 for fresh air. The pipe 6 opens into the receptacle (1 in tangential-dimotion, so that the current of air is delivered from the fan 0 into the separator d at the side thereof so as to move through the same along I a helical path. Therefore the heavier particles such for exam le as benzol'are thrown outwardly by centrifu a1 action and collectj i ed at the bottom of t e' separator d, from through the bottom of the case is dispensed whence they are dischargedtogether with a; art of the airthrough a pipe 1'. 'The air om which the benzol has been so arated is passedthroughthe intakelc of the pipe b and mto the bottom part e of the case a. Before traversing the heating system f the said cur'-' vrent of air takes in b suction a certain amount of fresh air a mitted through the pipe 9. Together with the vaporized solvent other foreign matter and more particularly particles of dust are separated from the cur rent, so that air which is free of dust and which contains much oxygen is passed in con.- tact with the goods having a coating of lacuer and contained within the case a. Thereore the goods are rapidly dried and a coating of superior quality is obtained.

The apparatus illustrated in Fig. 2 is similar to the one shown in Fig. 1. But in ad dition an apparatus for producing ozone is connected to thesys'tem. As shown, the said apparatus m is connected by a pipe g with the intake pipe of the fan or blower'c. The apparatus m ay have any known construction, and it has a supply of fresh air, the said air being ozonized. Thesupply of fresh air with, and all the air discharged through the outlet, 71 is replaced by air owing through the ozonizing apparatus m. t

I claim: A drying apparatus for lacquered articles and the like, comprising a main case providingian air drying chamber for the articles, a secondary case forming a cleanin chamber for the drying air, a conduit lea ing from the upper end of the drying chamber to the upper end of the cleaning chamber and opening thereinto at a tangent for circulating the air downwardly in a spiral path within the I cleaning chamber and depositing the heavy matter within the secondary case, means for removing the heavy matter from the secondary case, a fan in said conduit for drawing the air upwardly through the drying chamber and forcing it under pressure into the cleaning chamber, a return conduit leading from the intermediate central portion of the secondary case to the bottom of the main case to return the clean air to the drying chamber, heating means in the bottom of the main case for heating the air as it enters the drying chamber, an air supply conduit leading v signature,

to the inlet of the fan for replenishing air,

withdrawn with the heavy matter from the circuit, and an ozonizer disposed in the air supply conduit for supplying ozone to the air entering the secondary case.

In testimony whereof I hereunto afix my W 'OPAYSKY. 

